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Extraventricular Obstructive Hydrocephalus
Miral D. Jhaveri, MD, MBA
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KEY FACTS

  • Terminology

    • Imaging

      • Top Differential Diagnoses

        • Pathology

          • Clinical Issues

            • Diagnostic Checklist

              TERMINOLOGY

              • Abbreviations

                • Extraventricular obstructive hydrocephalus (EVOH)
              • Synonyms

                • "Communicating" hydrocephalus
              • Definitions

                • Enlarged ventricles due to obstruction located outside ventricular system

              IMAGING

              • General Features

                • CT Findings

                  • MR Findings

                    • Imaging Recommendations

                      • Other Modality Findings

                        DIFFERENTIAL DIAGNOSIS

                          PATHOLOGY

                          • General Features

                            • Gross Pathologic & Surgical Features

                              CLINICAL ISSUES

                              • Presentation

                                • Natural History & Prognosis

                                  • Treatment

                                    DIAGNOSTIC CHECKLIST

                                    • Consider

                                      Selected References

                                      1. Capone PM et al: Neuroimaging of normal pressure hydrocephalus and hydrocephalus. Neurol Clin. 38(1):171-83, 2020
                                      2. Farb R et al: Hydrocephalus and CSF disorders. Diseases of the brain, head and neck, spine 2020-3: Diagnostic Imaging. Cham (CH): Springer; 11-24, 2020
                                      3. Fowler JB et al: Ventriculoperitoneal shunt. Treasure Island (FL): StatPearls Publishing, 2020
                                      4. Roth J et al: The added value of magnetic resonance imaging cisternography and ventriculography as a diagnostic aid in pediatric Hydrocephalus. Pediatr Neurosurg. 54(3):165-72, 2019
                                      5. Fink KR et al: Imaging of nontraumatic neuroradiology emergencies. Radiol Clin North Am. 53(4):871-90, 2015
                                      6. Flannery AM et al: Pediatric hydrocephalus: systematic literature review and evidence-based guidelines. Part 1: introduction and methodology. J Neurosurg Pediatr. 14 Suppl 1:3-7, 2014
                                      7. Grunwald IQ et al: Aneurysmal SAH: current management and complications associated with treatment and disease. J Invasive Cardiol. 26(1):30-7, 2014
                                      8. Krähenbühl AK et al: Endoscopic temporal ventriculocisternostomy: an option for the treatment of trapped temporal horns. J Neurosurg Pediatr. 11(5):568-74, 2013
                                      9. McAllister JP 2nd: Pathophysiology of congenital and neonatal hydrocephalus. Semin Fetal Neonatal Med. 17(5):285-94, 2012
                                      10. Feng F et al: Evaluation of radionuclide cerebrospinal fluid scintigraphy as a guide in the management of patients with hydrocephalus. Clin Imaging. 33(2):85-9, 2009
                                      11. Yamada S et al: Visualization of cerebrospinal fluid movement with spin labeling at MR imaging: preliminary results in normal and pathophysiologic conditions. Radiology. 249(2):644-52, 2008
                                      12. Greitz D: Paradigm shift in hydrocephalus research in legacy of Dandy's pioneering work: rationale for third ventriculostomy in communicating hydrocephalus. Childs Nerv Syst. 23(5):487-9, 2007
                                      13. ter Laan M et al: Improvement after treatment of hydrocephalus in aneurysmal subarachnoid haemorrhage: implications for grading and prognosis. Acta Neurochir (Wien). 148(3):325-8; discussion 328, 2006
                                      14. Greitz D: Radiological assessment of hydrocephalus: new theories and implications for therapy. Neurosurg Rev. 27(3):145-65; discussion 166-7, 2004
                                      15. Kehler U et al: Extraventricular intracisternal obstructive hydrocephalus--a hypothesis to explain successful 3rd ventriculostomy in communicating hydrocephalus. Pediatr Neurosurg. 38(2):98-101, 2003
                                      16. Biedert S et al: [Extraventricular obstructive hydrocephalus.] Fortschr Neurol Psychiatr. 62(11):405-8, 1994
                                      Related Anatomy
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                                      Related Differential Diagnoses
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                                      References
                                      Tables

                                      Tables

                                      KEY FACTS

                                      • Terminology

                                        • Imaging

                                          • Top Differential Diagnoses

                                            • Pathology

                                              • Clinical Issues

                                                • Diagnostic Checklist

                                                  TERMINOLOGY

                                                  • Abbreviations

                                                    • Extraventricular obstructive hydrocephalus (EVOH)
                                                  • Synonyms

                                                    • "Communicating" hydrocephalus
                                                  • Definitions

                                                    • Enlarged ventricles due to obstruction located outside ventricular system

                                                  IMAGING

                                                  • General Features

                                                    • CT Findings

                                                      • MR Findings

                                                        • Imaging Recommendations

                                                          • Other Modality Findings

                                                            DIFFERENTIAL DIAGNOSIS

                                                              PATHOLOGY

                                                              • General Features

                                                                • Gross Pathologic & Surgical Features

                                                                  CLINICAL ISSUES

                                                                  • Presentation

                                                                    • Natural History & Prognosis

                                                                      • Treatment

                                                                        DIAGNOSTIC CHECKLIST

                                                                        • Consider

                                                                          Selected References

                                                                          1. Capone PM et al: Neuroimaging of normal pressure hydrocephalus and hydrocephalus. Neurol Clin. 38(1):171-83, 2020
                                                                          2. Farb R et al: Hydrocephalus and CSF disorders. Diseases of the brain, head and neck, spine 2020-3: Diagnostic Imaging. Cham (CH): Springer; 11-24, 2020
                                                                          3. Fowler JB et al: Ventriculoperitoneal shunt. Treasure Island (FL): StatPearls Publishing, 2020
                                                                          4. Roth J et al: The added value of magnetic resonance imaging cisternography and ventriculography as a diagnostic aid in pediatric Hydrocephalus. Pediatr Neurosurg. 54(3):165-72, 2019
                                                                          5. Fink KR et al: Imaging of nontraumatic neuroradiology emergencies. Radiol Clin North Am. 53(4):871-90, 2015
                                                                          6. Flannery AM et al: Pediatric hydrocephalus: systematic literature review and evidence-based guidelines. Part 1: introduction and methodology. J Neurosurg Pediatr. 14 Suppl 1:3-7, 2014
                                                                          7. Grunwald IQ et al: Aneurysmal SAH: current management and complications associated with treatment and disease. J Invasive Cardiol. 26(1):30-7, 2014
                                                                          8. Krähenbühl AK et al: Endoscopic temporal ventriculocisternostomy: an option for the treatment of trapped temporal horns. J Neurosurg Pediatr. 11(5):568-74, 2013
                                                                          9. McAllister JP 2nd: Pathophysiology of congenital and neonatal hydrocephalus. Semin Fetal Neonatal Med. 17(5):285-94, 2012
                                                                          10. Feng F et al: Evaluation of radionuclide cerebrospinal fluid scintigraphy as a guide in the management of patients with hydrocephalus. Clin Imaging. 33(2):85-9, 2009
                                                                          11. Yamada S et al: Visualization of cerebrospinal fluid movement with spin labeling at MR imaging: preliminary results in normal and pathophysiologic conditions. Radiology. 249(2):644-52, 2008
                                                                          12. Greitz D: Paradigm shift in hydrocephalus research in legacy of Dandy's pioneering work: rationale for third ventriculostomy in communicating hydrocephalus. Childs Nerv Syst. 23(5):487-9, 2007
                                                                          13. ter Laan M et al: Improvement after treatment of hydrocephalus in aneurysmal subarachnoid haemorrhage: implications for grading and prognosis. Acta Neurochir (Wien). 148(3):325-8; discussion 328, 2006
                                                                          14. Greitz D: Radiological assessment of hydrocephalus: new theories and implications for therapy. Neurosurg Rev. 27(3):145-65; discussion 166-7, 2004
                                                                          15. Kehler U et al: Extraventricular intracisternal obstructive hydrocephalus--a hypothesis to explain successful 3rd ventriculostomy in communicating hydrocephalus. Pediatr Neurosurg. 38(2):98-101, 2003
                                                                          16. Biedert S et al: [Extraventricular obstructive hydrocephalus.] Fortschr Neurol Psychiatr. 62(11):405-8, 1994